. >> and if you're married or data, facebook is putting together forever, but would you could do it? >>> a warning about a drug widely used against breast cancer. there's news the side effects could be worse than we knew for older patients. >> reporter: herceptin belongs to a class of drugs. it has been effective in treating some breast cancers but it can come with a price. herceptin can cause heart muscle damage that may lead to heart failure. a study in the journal of american cardiology suggests the drug could be more dangerous than previous thought. earlier studies had excluded older patients. this one focused on them. researchers found an increase of heart problems of 10%, higher than b the authors conclude that heart failure and damage to the heart muscle are more common complications of herceptin used in older women with higher rates than reported in previous clinical trials. with this medical minute, i'm dr. timothy johnson. >> teeth whitening treatments will cost you a small fortune to use.e are cheap at home if you like red wine, try snacking on a cube of cheese. it coats t